Surface & Deep Currents Chapter 14 Section 1

Bellringer How does the density of ocean water affect deep currents?

Bellringer How does the density of ocean water affect deep currents? Density causes variations in the movement of deep currents.

Objectives Review three factors that form surface currents Describe deep currents. Identify the three factors that form deep currents

Surface Currents Global Winds: Winds that blow across the Earth’s surface create surface currents in the ocean. Different winds cause currents to flow in different directions. The Coriolis Effect is the apparent curving of moving objects from a straight path due to the Earth’s rotation. Chapter 14

Surface Currents Continental Defections: When surface currents meet continents, the currents deflect, or change direction. Chapter 14

Surface Currents, continued Taking Temperature: Currents are also affected by the temperature of the water in which they form. The next slide shows Earth’s surface currents. Warm-water currents are shown as red arrows, and cold-water currents are shown as blue arrows. Chapter 14

Section 1 Currents Chapter 14

Deep Currents Streamlike movements of ocean water located far below the surface are called deep currents. Deep currents are not controlled by wind. Deep currents form in parts of the ocean where water density increases. The density of the ocean is affected by temperature and salinity.

Section 1 Currents Deep Currents, continued Formation and Movement of Deep Currents Differences in water density cause variations in the movement of deep currents. Chapter 14

Section 1 Currents Chapter 14

Objectives Review three factors that form surface currents Describe deep currents. Identify the three factors that form deep currents